2010/09/30 by Paolo Barone, P. Barone, K. Yamauchi +3 · 1 citation
Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Electron #Electronic structure #Ferroelectric and Piezoelectric Materials #Ferroelectricity #Magnetic and transport properties of perovskites and related materials #Materials science #Multiferroics and related materials #Physics #Polarizability #Quantum mechanics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.106.077201
published as Physical Review Letters 106, 077201 (2011) · 4 pages, 2 figures, figure and text substantially improved. Title changed
openalex publication_date 2011/02/14 · arxiv created 2011/02/24 · arxiv updated 2011/02/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Aiming at understanding the origin of the electronic contribution to ferroelectric polarization in undoped manganites, we evaluate the Berry phase of orbital-polarizable Bloch electrons as an orbital ordering (OO) establishes in the background of an antiferromagnetic E-type configuration. The onset of OO is tuned by the Jahn-Teller (JT) interaction in a tight-binding model for interacting electrons moving along zigzag chains. A finite polarization is found as soon as the JT coupling is strong enough to induce OO, supporting the large electronic contribution predicted from first principles.